sushinomics
An approach to economy, personal or world-wide, that compares prices and value to the cost of one's favorite sushi. For instance, movie admission is usually a two-sushi price; popcorn and soda often a three-sushi price. One can decide on whether a movie with popcorn and soda is worth an entire sushi dinner.
According to the first law of sushinomics, that dress is not worth the unagi it costs.